Barry Allen found himself facing off against any number of colorful, larger-than-life adversaries in the first season of The Flash. With a beefier special effects budget than most TV shows, he found himself up against human tornadoes, a super-powered pyromaniac, and – perhaps most memorably – a huge, psychic, talking gorilla.

Out of all the ridiculous concepts that appear throughout The Flash, it was Gorilla Grodd that was the most difficult to pull off. A bit of dodgy CGI, too...